Ollama Launch Claude — API Error 400 with CLAUDE_CODE_USE_BEDROCK Conflict

What this error means

API Error (model_name): 400 The provided model identifier is invalid. is a Ollama failure pattern reported for developers trying to fix ollama launch claude failing with 400 error when claude_code_use_bedrock is set. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

Official Ollama issue #16097 (2026-05-11) documents that ollama launch claude fails with 400 API Error when user has CLAUDE_CODE_USE_BEDROCK=1 in Claude Code settings.json. Bedrock rejects the local Ollama model name.

Common causes

• Developers trying to use ollama launch claude with local models hit a 400 error because Claude Code’s Bedrock routing overrides the Ollama model name. This is a cross-tool integration failure affecting users of both Ollama and Claude Code simultaneously.
• Official Ollama issue #16097 (2026-05-11) documents that ollama launch claude fails with 400 API Error when user has CLAUDE_CODE_USE_BEDROCK=1 in Claude Code settings.json. Bedrock rejects the local Ollama model name.

Quick fixes

1. Confirm the exact error signature matches API Error (model_name): 400 The provided model identifier is invalid..
2. Check the Ollama account, local tool state, and provider configuration involved in the failing workflow.
3. Compare the failing environment with a known working setup, then change one configuration value at a time.

Platform/tool-specific checks

• Verify the command, editor, extension, or API client that produced the error.
• Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
• Avoid deleting credentials, local model data, or project settings until the failing scope is clear.

Step-by-step troubleshooting

1. Capture the exact error message and the command, editor action, or request that triggered it.
2. Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
3. Review the source evidence below and compare it with your environment.
4. Apply one change at a time and rerun the smallest failing action.
5. Keep the working fix documented for the team or deployment environment.

How to prevent it

• Keep provider/tool configuration documented.
• Record non-secret diagnostics such as tool version, provider name, model name, and command path.
• Add a lightweight check before CI or production workflows depend on the tool.

Sources checked

• https://github.com/ollama/ollama/issues/16097

Evidence note: Official Ollama issue #16097 (2026-05-11) documents that ollama launch claude fails with 400 API Error when user has CLAUDE_CODE_USE_BEDROCK=1 in Claude Code settings.json. Bedrock rejects the local Ollama model name.

Related errors

• Ollama model not recognized by Claude Code
• Claude Code Bedrock routing override conflicts

FAQ

What should I check first?

Start with the exact API Error (model_name): 400 The provided model identifier is invalid. text and the smallest action that reproduces it.

Can I ignore this error?

No. Treat it as a failed Ollama workflow until the root cause is understood.

Is this guaranteed to have one fix?

No. The imported evidence supports the troubleshooting path above, but tool behavior can vary by account, plan, version, provider, and local configuration.

How do I know the fix worked?

Rerun the same command, editor action, or request. The fix is working when that action completes without API Error (model_name): 400 The provided model identifier is invalid..